Cooling system and control method thereof

Abstract

The invention discloses a cooling system and a control method thereof. The cooling system comprises a controller, a lubricating oil loop, a secondary refrigerant loop and a cooling water loop. The lubricating oil loop comprises a first oil pump, a first oil tank and a second oil pump which are sequentially communicated; the first oil pump is communicated with an oil inlet of a tested object through a first flow channel of the first heat exchanger; the second oil pump is communicated with an oil outlet of the tested object; a first temperature sensor is arranged between the first flow channel and the oil inlet and used for measuring the first temperature of lubricating oil input into the oil inlet. In the secondary refrigerant loop, the second flow channel of the first heat exchanger, the circulating pump and the third flow channel of the second heat exchanger are communicated in sequence; in the cooling water loop, a cooling water inlet, an electric adjusting two-way valve, a fourth flow channel of the second heat exchanger and a cooling water outlet are sequentially communicated; the controller is electrically connected with the electric adjusting two-way valve so as to adjust the first temperature. According to the technical scheme provided by the invention, the temperature control precision of the lubricating oil of the cooling system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of display liquid cooling devices, and in particular to a cooling system and a control method thereof. Background Art

[0002] During the testing process of many devices, the test product needs to be cooled to simulate the actual working environment or prevent overheating damage, so as to detect the performance of the test product.

[0003] Traditional cooling equipment has problems such as low temperature control accuracy and low cooling efficiency. For example, some cooling equipment cannot accurately adjust the flow and temperature of the cooling medium, resulting in large temperature fluctuations of the test product, affecting the accuracy of the test results. Summary of the invention

[0004] An embodiment of the present invention provides a cooling system and a control method thereof, so as to improve the temperature control accuracy of lubricating oil in the cooling system.

[0005] In a first aspect, an embodiment of the present invention provides a cooling system, comprising: a controller, a lubricating oil circuit, a coolant circuit, and a cooling water circuit; the lubricating oil circuit exchanges heat with the coolant circuit through a first heat exchanger; the coolant circuit exchanges heat with the cooling water circuit through a second heat exchanger;

[0006] The lubricating oil circuit includes a first oil pump, a first oil tank, and a second oil pump which are sequentially connected through pipelines; the first oil pump is connected to the oil inlet of the test product through the first flow channel of the first heat exchanger; the second oil pump is connected to the oil outlet of the test product; a first temperature sensor is provided on the pipeline between the first flow channel and the oil inlet for measuring the first temperature of the lubricating oil input to the oil inlet; the coolant circuit includes a circulating pump; the second flow channel of the first heat exchanger, the circulating pump, and the third flow channel of the second heat exchanger are sequentially connected through pipelines; the cooling water circuit includes an electrically adjustable two-way valve; the cooling water inlet, the electrically adjustable two-way valve, the fourth flow channel of the second heat exchanger, and the cooling water outlet are sequentially connected through pipelines;

[0007] The controller is electrically connected to the first temperature sensor and the electric regulating two-way valve respectively, and is used to control a first flow rate of cooling water entering the fourth flow channel to adjust the first temperature.

[0008] In a second aspect, an embodiment of the present invention further provides a method for controlling a cooling system, which is applicable to the cooling system provided by any embodiment of the present invention. The method for controlling a cooling system includes:

[0009] If the first temperature is greater than the set temperature range, the controller controls the opening of the electric regulating two-way valve to increase so as to increase the amount of heat absorbed by the cooling water from the secondary coolant; the amount of heat absorbed by the secondary coolant from the lubricating oil increases until the first temperature transmitted to the controller by the first temperature sensor drops to the set temperature range;

[0010] If the first temperature is lower than the set temperature range, the controller controls the opening of the electric regulating two-way valve to decrease so as to reduce the heat absorbed by the cooling water from the coolant; the heat absorbed by the coolant from the lubricating oil decreases until the first temperature transmitted by the first temperature sensor to the controller rises to the set temperature range.

[0011] In the present invention, the cooling system includes a controller, a lubricating oil circuit, a coolant circuit and a cooling water circuit, wherein in the lubricating oil circuit, a lubricating oil circulation path is formed between the oil outlet of the test product, the second oil pump, the first oil tank, the first oil pump, the first flow channel of the first heat exchanger and the oil inlet of the test product, and a first temperature sensor is also provided at the oil inlet of the test product, which can measure the first temperature of the lubricating oil input to the oil inlet; in the coolant circuit, a coolant circulation circuit is formed between the second flow channel of the first heat exchanger, the circulating pump and the third flow channel of the second heat exchanger; in the cooling water circuit, a cooling water circulation circuit is formed between the cooling water inlet, the electric regulating two-way valve, the fourth flow channel of the second heat exchanger and the cooling water outlet; then, heat exchange is performed between the lubricating oil circuit and the coolant circuit through the first heat exchanger, and heat exchange is performed between the coolant circuit and the cooling water circuit through the second heat exchanger. The controller can control the opening of the electrically adjustable two-way valve in the cooling water circuit, thereby controlling the first flow of cooling water through the fourth flow channel, thereby controlling the heat obtained by the cooling water from the coolant, and then controlling the heat obtained by the coolant from the lubricating oil, and finally achieving the purpose of controlling the temperature of the lubricating oil at the oil inlet of the test product. The controller can monitor the first temperature according to the first temperature sensor, and then the controller adjusts the electrically adjustable two-way valve, which can realize automatic and accurate control of the first temperature of the lubricating oil pumped into the test product, and then can accurately control the temperature of the test product, meet the test conditions of the test product, avoid affecting the test results of the test product due to excessive temperature fluctuations of the test product, and improve the cooling efficiency of the cooling system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of the structure of a cooling system provided by an embodiment of the present invention;

[0013] Figure 2 A schematic diagram of the structure of another cooling system provided by an embodiment of the present invention;

[0014] Figure 3A schematic flow chart of a method for controlling a cooling system provided by an embodiment of the present invention;

[0015] Figure 4 A schematic flow chart of another cooling system control method provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0017] An embodiment of the present invention provides a cooling system, such as Figure 1 As shown, Figure 1 A schematic diagram of a cooling system provided in an embodiment of the present invention, wherein the cooling system 01 comprises: a controller 06, a lubricating oil circuit s1, a coolant circuit s2 and a cooling water circuit s3; the lubricating oil circuit s1 exchanges heat with the coolant circuit s2 through a first heat exchanger 02; the coolant circuit s2 exchanges heat with the cooling water circuit s3 through a second heat exchanger 03;

[0018] The lubricating oil circuit s1 includes a first oil pump 11, a first oil tank 12, and a second oil pump 13 which are sequentially connected through pipelines; the first oil pump 11 is connected to the oil inlet 101 of the test object 10 through the first flow channel of the first heat exchanger 02; the second oil pump 13 is connected to the oil outlet 102 of the test object 10; the pipeline between the first flow channel and the oil inlet 101 is provided with a first temperature sensor 14 for measuring the first temperature of the lubricating oil input to the oil inlet 101; the coolant circuit s2 includes a circulating pump 15; the second flow channel of the first heat exchanger 02, the circulating pump 15, and the third flow channel of the second heat exchanger 03 are sequentially connected through pipelines; the cooling water circuit s3 includes an electrically adjustable two-way valve 16; the cooling water inlet 04, the electrically adjustable two-way valve 16, the fourth flow channel of the second heat exchanger 03, and the cooling water outlet 05 are sequentially connected through pipelines;

[0019] The controller 06 is electrically connected to the first temperature sensor 14 and the electric regulating two-way valve 16 respectively, and is used to control the first flow rate of cooling water entering the fourth flow channel to adjust the first temperature.

[0020] In an embodiment of the present invention, the cooling system includes a controller, a lubricating oil circuit, a coolant circuit and a cooling water circuit, wherein in the lubricating oil circuit, a lubricating oil circulation path is formed between the oil outlet of the test product, the second oil pump, the first oil tank, the first oil pump, the first flow channel of the first heat exchanger and the oil inlet of the test product, and a first temperature sensor is also provided at the oil inlet of the test product, which can measure the first temperature of the lubricating oil input to the oil inlet; in the coolant circuit, a coolant circulation circuit is formed between the second flow channel of the first heat exchanger, the circulating pump and the third flow channel of the second heat exchanger; in the cooling water circuit, a cooling water circulation circuit is formed between the cooling water inlet, the electric regulating two-way valve, the fourth flow channel of the second heat exchanger and the cooling water outlet; then, heat exchange is performed between the lubricating oil circuit and the coolant circuit through the first heat exchanger, and heat exchange is performed between the coolant circuit and the cooling water circuit through the second heat exchanger. The controller can control the opening of the electrically adjustable two-way valve in the cooling water circuit, thereby controlling the first flow of cooling water through the fourth flow channel, thereby controlling the heat obtained by the cooling water from the coolant, and then controlling the heat obtained by the coolant from the lubricating oil, and finally achieving the purpose of controlling the temperature of the lubricating oil at the oil inlet of the test product. The controller can monitor the first temperature according to the first temperature sensor, and then the controller adjusts the electrically adjustable two-way valve, which can realize automatic and accurate control of the first temperature of the lubricating oil pumped into the test product, and then can accurately control the temperature of the test product, meet the test conditions of the test product, avoid affecting the test results of the test product due to excessive temperature fluctuations of the test product, and improve the cooling efficiency of the cooling system.

[0021] The above is the core idea of ​​the present invention. The technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] The cooling system 01 may include a controller 06, a lubricating oil circuit s1, a coolant circuit s2, and a cooling water circuit s3. The lubricating oil circuit s1 forms a circulation path for lubricating oil, which is used to cool down and cool the test object through the lubricating oil; the coolant circuit s2 forms a circulation path for the coolant, and exchanges heat with the lubricating oil of the lubricating oil circuit s1 through the first heat exchanger 02, and removes the heat obtained by the lubricating oil from the test object; the cooling water circuit s3 forms a circulation path for cooling water, and exchanges heat with the coolant of the coolant circuit s2 through the second heat exchanger 03, and further removes the heat obtained by the coolant from the lubricating oil. The coolant, as a cooling medium, conducts heat between the lubricating oil and the cooling water, and can be a cooling medium of various materials commonly used, such as lubricating oil and water. The specific materials are not particularly limited in this embodiment. The controller 06 can monitor or control the working status of the lubricating oil circuit s1, the coolant circuit s2, and the cooling water circuit s3 to achieve temperature control of the test object. In this embodiment, the test product can be used in test scenarios that require precise control of cooling temperature and flow rate, such as equipment testing in the fields of aviation, automobiles, electronics, etc.

[0023] Specifically, the lubricating oil circuit s1 includes a first oil pump 11, a first oil tank 12, and a second oil pump 13 which are sequentially connected through pipelines. The first oil pump 11 is used as an oil feed pump to pump lubricating oil into the oil inlet 101 of the test object 10, and a first heat exchanger 02 is provided between the first oil pump 11 and the oil inlet 101. The lubricating oil passes through the first flow channel of the first heat exchanger 02 and is cooled before entering the oil inlet 101 of the test object 10. After the lubricating oil absorbs the heat generated by the test object 10, it is pumped out from the oil outlet 102 of the test object 10 by the second oil pump 13. The second oil pump 13 is used as an oil return pump to extract the lubricating oil from the test object 10 and transfer it to the first oil tank 12. The first oil tank 12 stores lubricating oil to meet the needs of normal operation of the system, and the user can add and replace the lubricating oil through the first oil tank 12. After that, because the temperature of the lubricating oil pumped out from the test object 10 increases, the first oil pump 11 can continue to transfer the lubricating oil with increased temperature to the first flow channel of the first heat exchanger 02 for cooling. The first heat exchanger 02 is an oil cooler, including a first flow channel and a second flow channel. The first flow channel contains lubricating oil, and the second flow channel contains coolant. The first heat exchanger 02 can transfer the heat absorbed by the lubricating oil in the test object to the coolant.

[0024] The refrigerant circuit s2 includes a circulating pump 15. The second flow channel of the first heat exchanger 02, the circulating pump 15 and the third flow channel of the second heat exchanger 03 are connected in sequence through a pipeline to form a refrigerant circulation passage. Among them, the second heat exchanger 03 is a water-cooled heat exchanger, including a third flow channel and a fourth flow channel. The third flow channel is connected to the refrigerant, and the fourth flow channel is connected to the cooling water. The circulating pump 15 meets the heat exchange needs between the oil cooler and the water-cooled heat exchanger.

[0025] The cooling water circuit s3 includes an electrically adjustable two-way valve 16, and the cooling water inlet 04, the electrically adjustable two-way valve 16, the fourth flow channel of the second heat exchanger 03, and the cooling water outlet 05 are connected in sequence through a pipeline to form a cooling water circulation passage. The controller 06 is electrically connected to the electrically adjustable two-way valve 16, and the controller 06 can adjust the opening of the electrically adjustable two-way valve 16, and then adjust the flow rate of cooling water entering the water-cooled heat exchanger, which can be referred to as the first flow rate in this embodiment. Exemplarily, when the first flow rate of cooling water entering the second heat exchanger 03 is larger, the heat exchange effect is better; when the first flow rate of cooling water entering the second heat exchanger 03 is smaller, the heat exchange effect is worse. In addition, it should be noted that the controller 06 in this embodiment is also electrically connected to the first temperature sensor 14, and the first temperature sensor 14 is arranged on the pipeline between the first flow channel and the oil inlet 101. When the first temperature sensor 14 measures that the actual oil inlet temperature (first temperature) of the oil inlet 101 is higher than the set temperature range, the conductance opening of the electrically adjustable two-way valve 16 is increased, and the amount of cooling water entering the water-cooled radiator (second heat exchanger 03) increases; the amount of heat absorbed by the cooling water in the water-cooled radiator increases, the amount of heat absorbed by the coolant by the cooling water increases, and the temperature of the coolant output from the water-cooled radiator decreases; the amount of heat absorbed by the coolant with a lower temperature in the oil cooler (first heat exchanger 02) increases, the amount of heat absorbed by the lubricating oil by the coolant increases, and the oil inlet temperature input to the oil inlet 101 decreases. This embodiment can continuously adjust the conductance opening of the electrically adjustable two-way valve 16 according to the set temperature range of the first temperature until the actual oil inlet temperature meets the set temperature range. When the first temperature sensor 14 measures that the actual oil inlet temperature (first temperature) of the oil inlet 101 is lower than the set temperature range, the conduction opening of the electric regulating two-way valve 16 is reduced, and the cooling water entering the water-cooled radiator (second heat exchanger 03) is reduced; the heat absorbed by the cooling water in the water-cooled radiator is reduced, the heat absorbed by the coolant by the cooling water is reduced, and the coolant temperature output from the water-cooled radiator rises; the heat absorbed by the coolant with a higher temperature in the oil cooler (first heat exchanger 02) is reduced, and the heat absorbed by the lubricating oil by the coolant is reduced, and the oil inlet temperature input to the oil inlet 101 increases. This embodiment can continuously adjust the conduction opening of the electric regulating two-way valve 16 according to the set temperature range of the first temperature until the actual oil inlet temperature meets the set temperature range. The above-mentioned first temperature adjustment method realizes automatic and precise control of the first temperature of the lubricating oil pumped into the test product, and then can accurately control the temperature of the test product, meet the working environment or test conditions of the test product, and improve the test effect or working effect of the test product.

[0026] Figure 2A schematic diagram of the structure of another cooling system provided by an embodiment of the present invention, optionally, the lubricating oil circuit s1 may also include: a first solenoid valve 17 and a second solenoid valve 18; the controller 06 is electrically connected to the first solenoid valve 17 and the second solenoid valve 18 respectively; the first end of the first solenoid valve 17 is connected to an end of the second oil pump 13 close to the oil outlet 102; the second end of the first solenoid valve 17 is connected to an end of the first flow channel close to the first oil pump 11; the second solenoid valve 18 is arranged between the first oil tank 12 and the second oil pump 13. This embodiment can control the conduction and shutoff of the first solenoid valve 17 and the second solenoid valve 18, and control the cooling system in different working modes. This embodiment provides a cooling system for a test product with multiple working modes, which is particularly suitable for test scenarios that require precise control of cooling temperature and flow, such as equipment testing in the fields of aviation, automobiles, electronics, etc. In addition, the controller 06 can control the conduction and shutoff of the first solenoid valve 17 and the second solenoid valve 18 to achieve automatic switching of multiple working modes of the cooling system. For example, for the test products with their own oil pumps and those without their own oil pumps, different lubricating oil circuits need to be formed during the cooling process, so the adaptability of the prior art to different types of test products is relatively poor. The present embodiment can provide different types of test products with different lubricating oil circuits by turning on and off the first solenoid valve 17 and the second solenoid valve 18, thereby improving the compatibility of the cooling system of the present embodiment with different types of test products while ensuring the temperature regulation accuracy.

[0027] Specifically, refer to Figure 2 Optionally, the cooling system can be configured as follows: in the first working mode, the controller 06 controls the first solenoid valve 17 and the second solenoid valve 18 to be turned off, and controls the first oil pump 11 to start, so as to inject a set flow of lubricating oil into the test product 10; in the second working mode, the controller 06 controls the first solenoid valve 17 to be turned off, the second solenoid valve 18 and the electric regulating two-way valve 16 to be turned on, and controls the first oil pump 11, the second oil pump 13 and the circulating pump 15 to start, so as to adjust the first temperature of the first test product; the first test product is the test product 10 that does not have its own oil pump; in the third working mode, the controller 06 controls the first solenoid valve 17 and the electric regulating two-way valve 16 to be turned on, the second solenoid valve 18 to be turned off, and controls the circulating pump 15 to start, so as to adjust the first temperature of the second test product; the second test product is the test product 10 that has its own oil pump.

[0028] In this embodiment, the cooling system can form a first working mode, a second working mode and a third working mode respectively. Among them, the first working mode is the oil injection mode for the test product 10. The controller 06 controls the first solenoid valve 17 and the second solenoid valve 18 to be turned off. Then the lubricating oil in the first oil tank 12 passes through the first oil pump 11 and the first flow channel of the first heat exchanger 02 in turn into the oil inlet 101 of the test product 10. Then the cooling system of this embodiment can be reused as the oil injection device of the test product, and a flow sensor 19 can be set near the oil inlet 101 of the test product 10 to inject the lubricating oil of the set flow rate according to the needs of the test product, so as to further improve the compatibility of the cooling system; the second working mode is to cool the first test product. The first test product is the test product 10 that does not have its own oil pump. Then the controller 06 controls the first solenoid valve 17 to be turned off, the second solenoid valve 18 and the electric regulating two-way valve 16 to be turned on, and the lubricating oil in the lubricating oil circuit s1 passes through the oil outlet 102, The second oil pump 13, the second solenoid valve 18, the first oil tank 12, the first oil pump 11, the first flow channel of the first heat exchanger and the oil inlet 101 of the first test product form a lubricating oil circulation path. In addition, the refrigerant circuit s2 and the cooling water circuit s3 regulate the temperature of the lubricating oil. The third working mode is to cool the second test product. The second test product is the test product 10 with its own oil pump. The controller 06 controls the first solenoid valve 17 and the electric regulating two-way valve 16 to be turned on, and the second solenoid valve 18 to be turned off. The lubricating oil in the lubricating oil circuit s1 passes through the oil outlet 102 of the first test product, the first solenoid valve 17, the first flow channel of the first heat exchanger and the oil inlet 101 of the first test product in turn to form a lubricating oil circulation path. That is, the lubricating oil of the second test product forms a circulation itself, and the temperature of the lubricating oil is regulated by the refrigerant circuit s2 and the cooling water circuit s3. It should be noted that, if Figure 2 As shown, the difference between the second working mode and the third working mode is that the second working mode controls the lubricating oil in the first oil tank 12 to circulate; the third working mode controls the lubricating oil inside the test object with its own oil pump to circulate outside and perform temperature reduction regulation. The above multiple working modes can enable the cooling system in this embodiment to be applied to more scenarios and improve the adaptability of the cooling system. It solves the problem that the existing cooling system working mode is limited and it is difficult to accurately meet the cooling requirements of different test objects and test conditions.

[0029] Continue to refer Figure 1 and Figure 2Optionally, the coolant circuit s2 may also include: a second oil tank 25 and a pipeline electric heater 26. The second oil tank 25 is used to replenish or replace the coolant for the coolant circuit s2. Optionally, the second oil tank 25 may also be provided with an oil replenishment quick plug connector 251 for replenishing the coolant through the oil replenishment quick plug connector 251. In addition, the second oil tank 25 may also be provided with a liquid level switch 252, which can issue a liquid replenishment prompt when the liquid level is lower than a certain scale. The pipeline electric heater 26 is used to increase the temperature of the coolant. It should be noted that when the lubricating oil temperature is low and does not meet the working or test requirements of the test product, the controller 06 can control the pipeline electric heater 26 to heat and increase the temperature of the coolant, thereby increasing the temperature of the lubricating oil through the first heat exchanger 02. The design of the pipeline electric heater 26 in this embodiment enables the cooling system to not only reduce the temperature of the lubricating oil, but also increase the temperature of the lubricating oil, thereby achieving a wider range of temperature adjustment and improving the applicability of the cooling system.

[0030] Continue to refer Figure 2 Optionally, the lubricating oil circuit s1 may further include: a first check valve 20 and a second check valve 21; the first check valve 20 is arranged on the pipeline between the first oil pump 11 and the first flow channel; the second check valve 21 is arranged on the pipeline between the first solenoid valve 17 and the first flow channel. The first check valve 20 is arranged in the circulation path of the lubricating oil in the first working mode and the second working mode, and can ensure that the lubricating oil flows from the first oil pump 11 to the first flow channel; the second check valve 21 is arranged in the circulation path of the lubricating oil in the third working mode, and can ensure that the lubricating oil flows from the first solenoid valve 17 to the first flow channel. The first check valve 20 and the second check valve 21 effectively prevent the lubricating oil from flowing back, further improving the reliability of the cooling system.

[0031] Continue to refer Figure 1 and Figure 2 Optionally, the lubricating oil circuit s1 may also include: a first quick-connect connector 271 and a second quick-connect connector 272; the lubricating oil circuit s1 is plugged into the oil inlet 101 through the first quick-connect connector 271; the lubricating oil circuit s1 is plugged into the oil outlet 102 through the second quick-connect connector 272. In this embodiment, the lubricating oil circuit s1 establishes a communication path with the test object through the first quick-connect connector 271 and the second quick-connect connector 272, respectively, to improve the convenience of establishing the communication path. In addition, different types of test objects are provided with quick-connect connectors of the same specifications. In this embodiment, the cooling system can connect different types of test objects through quick-connect connectors to improve the working efficiency of the cooling system and further enhance the compatibility of the cooling system.

[0032] Continue to refer Figure 1 and Figure 2Optionally, the lubricating oil circuit s1 may further include: a flow sensor 19; the flow sensor 19 is disposed on the pipeline between the first flow channel and the oil inlet 101, and is used to detect the second flow rate of the lubricating oil input to the oil inlet 101. The flow sensor 19 may be electrically connected to the controller 06. When the flow rate of the lubricating oil pumped into the oil inlet 101 of the test product needs to be controlled, the controller 06 may control the pumping speed of the first oil pump 11 or the second oil pump 13 according to the second flow rate output by the flow sensor 19, so as to further improve the accuracy of the flow rate of the lubricating oil pumped into the test product of the cooling system.

[0033] Continue to refer Figure 1 and Figure 2 Optionally, the lubricating oil circuit s1 may also include: a second temperature sensor 22, a first pressure sensor 231, a second pressure sensor 232, a first filter 241 and a second filter 242; the first pressure sensor 231 and the first filter 241 are arranged on the pipeline between the first flow channel and the oil inlet 101; the second temperature sensor 22, the second pressure sensor 232 and the second filter 242 are arranged on the pipeline between the oil outlet 102 and the second oil pump 13. The second temperature sensor 22 is used to measure the temperature of the lubricating oil extracted from the test product, the first pressure sensor 231 is used to measure the pipeline pressure of the oil inlet 101 of the test product, the second pressure sensor 232 is used to measure the pipeline pressure of the oil outlet 102 of the test product, and the first filter 241 and the second filter 242 are used to filter the pollutants in the pipeline to prevent the pollutants from entering the test product and the cooling system of the test product. The above components work together to ensure the normal operation of the cooling system. It should be noted that each device provided in this embodiment can be electrically connected to the controller 06, so that the controller 06 can control each device to perform various operations and detect various data of the cooling system to improve the automation of the cooling system. This embodiment can have an intelligent control system equipped with a variety of high-precision sensors that can monitor key parameters such as temperature, flow, and pressure of the test product in real time. Based on these monitoring data, the control system can automatically realize multiple working modes and accurately adjust the temperature.

[0034] Based on the same concept, an embodiment of the present invention further provides a method for controlling a cooling system. Figure 3 A flow chart of a control method for a cooling system provided by an embodiment of the present invention is shown as follows: Figure 3 As shown, the method of this embodiment includes the following steps:

[0035] Step S110, if the first temperature is greater than the set temperature range, the controller controls the opening of the electric regulating two-way valve to increase so as to increase the heat absorbed by the cooling water from the coolant; the heat absorbed by the coolant from the lubricating oil increases until the first temperature transmitted to the controller by the first temperature sensor drops to the set temperature range.

[0036] Step S120: If the first temperature is lower than the set temperature range, the controller controls the opening of the electrically adjustable two-way valve to decrease so as to reduce the amount of heat absorbed by the cooling water from the coolant; the amount of heat absorbed by the coolant from the lubricating oil decreases until the first temperature transmitted to the controller by the first temperature sensor rises to the set temperature range.

[0037] In an embodiment of the present invention, the cooling system includes a controller, a lubricating oil circuit, a coolant circuit and a cooling water circuit, wherein in the lubricating oil circuit, a lubricating oil circulation path is formed between the oil outlet of the test product, the second oil pump, the first oil tank, the first oil pump, the first flow channel of the first heat exchanger and the oil inlet of the test product, and a first temperature sensor is also provided at the oil inlet of the test product, which can measure the first temperature of the lubricating oil input to the oil inlet; in the coolant circuit, a coolant circulation circuit is formed between the second flow channel of the first heat exchanger, the circulating pump and the third flow channel of the second heat exchanger; in the cooling water circuit, a cooling water circulation circuit is formed between the cooling water inlet, the electric regulating two-way valve, the fourth flow channel of the second heat exchanger and the cooling water outlet; then, heat exchange is performed between the lubricating oil circuit and the coolant circuit through the first heat exchanger, and heat exchange is performed between the coolant circuit and the cooling water circuit through the second heat exchanger. The controller can control the opening of the electrically adjustable two-way valve in the cooling water circuit, thereby controlling the first flow of cooling water through the fourth flow channel, thereby controlling the heat obtained by the cooling water from the coolant, and then controlling the heat obtained by the coolant from the lubricating oil, and finally achieving the purpose of controlling the temperature of the lubricating oil at the oil inlet of the test product. The controller can monitor the first temperature according to the first temperature sensor, and then the controller adjusts the electrically adjustable two-way valve, which can realize automatic and accurate control of the first temperature of the lubricating oil pumped into the test product, and then can accurately control the temperature of the test product, meet the test conditions of the test product, avoid affecting the test results of the test product due to excessive temperature fluctuations of the test product, and improve the cooling efficiency of the cooling system.

[0038] On the basis of the above embodiment, optionally, the lubricating oil circuit further includes: a first solenoid valve and a second solenoid valve; a controller is electrically connected to the first solenoid valve and the second solenoid valve respectively; a first end of the first solenoid valve is connected to an end of the second oil pump close to the oil outlet; a second end of the first solenoid valve is connected to an end of the first flow channel close to the first oil pump; the second solenoid valve is arranged between the first oil tank and the second oil pump, such as Figure 4 As shown, Figure 4 A flow chart of another cooling system control method provided by an embodiment of the present invention is shown as follows: Figure 4 As shown, the method of this embodiment includes the following steps:

[0039] Step S210: In the first working mode, the controller controls the first solenoid valve and the second solenoid valve to be turned off, and controls the first oil pump to start, so as to inject a set flow of lubricating oil into the test product.

[0040] Step S220, in the second working mode, the controller controls the first solenoid valve to be turned off, the second solenoid valve and the electric regulating two-way valve to be turned on, and controls the first oil pump, the second oil pump and the circulating pump to start, so as to adjust the first temperature of the first test product; the first test product is a test product that does not have its own oil pump.

[0041] Step S230, in the third working mode, the controller controls the first solenoid valve and the electric regulating two-way valve to be turned on, the second solenoid valve to be turned off, and controls the circulation pump to start to adjust the first temperature of the second test product; the second test product is a test product with its own oil pump.

[0042] This embodiment can control the conduction and shutdown of the first solenoid valve and the second solenoid valve, and control the cooling system in different working modes. The first working mode is the oil injection mode of the test product, the second working mode is the temperature adjustment mode of the test product that does not have its own oil pump, and the third working mode is the temperature adjustment mode of the test product that has its own oil pump. This embodiment provides a cooling system for the test product with multiple working modes, which can enable the cooling system in this embodiment to be applied to more scenarios and improve the adaptability of the cooling system. It solves the problem that the existing cooling system is limited in working modes and it is difficult to accurately meet the cooling requirements of different test products and test conditions.

[0043] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A cooling system, characterized in that: include: A controller, a lubricating oil circuit, a coolant circuit and a cooling water circuit; the lubricating oil circuit exchanges heat with the coolant circuit through a first heat exchanger; the coolant circuit exchanges heat with the cooling water circuit through a second heat exchanger; The lubricating oil circuit includes a first oil pump, a first oil tank, and a second oil pump which are sequentially connected through pipelines; the first oil pump is connected to the oil inlet of the test product through the first flow channel of the first heat exchanger; the second oil pump is connected to the oil outlet of the test product; a first temperature sensor is provided on the pipeline between the first flow channel and the oil inlet for measuring the first temperature of the lubricating oil input to the oil inlet; the coolant circuit includes a circulating pump; the second flow channel of the first heat exchanger, the circulating pump, and the third flow channel of the second heat exchanger are sequentially connected through pipelines; the cooling water circuit includes an electrically adjustable two-way valve; the cooling water inlet, the electrically adjustable two-way valve, the fourth flow channel of the second heat exchanger, and the cooling water outlet are sequentially connected through pipelines; The controller is electrically connected to the first temperature sensor and the electric regulating two-way valve respectively, and is used to control a first flow rate of cooling water entering the fourth flow channel to adjust the first temperature.

2. The cooling system according to claim 1, characterized in that: The lubricating oil circuit further includes: a first solenoid valve and a second solenoid valve; the controller is electrically connected to the first solenoid valve and the second solenoid valve respectively; The first end of the first solenoid valve is in communication with an end of the second oil pump close to the oil outlet; the second end of the first solenoid valve is in communication with an end of the first flow channel close to the first oil pump; The second solenoid valve is disposed between the first oil tank and the second oil pump.

3. The cooling system according to claim 2, characterized in that: The cooling system is configured as follows: In the first working mode, the controller controls the first solenoid valve and the second solenoid valve to be turned off, and controls the first oil pump to start, so as to inject a set flow of lubricating oil into the test product; In the second working mode, the controller controls the first solenoid valve to be turned off, the second solenoid valve and the electric regulating two-way valve to be turned on, and controls the first oil pump, the second oil pump and the circulating pump to start, so as to adjust the first temperature of the first test product; the first test product is a test product that does not have its own oil pump; In the third working mode, the controller controls the first solenoid valve and the electric regulating two-way valve to be turned on, the second solenoid valve to be turned off, and controls the circulation pump to start to adjust the first temperature of the second test product; the second test product is a test product with its own oil pump.

4. The cooling system according to claim 2, characterized in that: The coolant circuit also includes: a second oil tank and a pipeline electric heater; The second oil tank is used to replenish or replace the coolant in the coolant circuit; the pipeline electric heater is used to increase the temperature of the coolant.

5. The cooling system according to claim 2, characterized in that: The lubricating oil circuit further includes: a first check valve and a second check valve; The first check valve is arranged on a pipeline between the first oil pump and the first flow channel; the second check valve is arranged on a pipeline between the first solenoid valve and the first flow channel.

6. The cooling system according to claim 2, characterized in that: The lubricating oil circuit further includes: a first quick-connect fitting and a second quick-connect fitting; The lubricating oil circuit is plugged into the oil inlet through the first quick-plug connector; the lubricating oil circuit is plugged into the oil outlet through the second quick-plug connector.

7. The cooling system according to claim 1, characterized in that: The lubricating oil circuit further includes: a flow sensor; the flow sensor is disposed on a pipeline between the first flow channel and the oil inlet, and is used to detect a second flow rate of the lubricating oil input into the oil inlet.

8. The cooling system according to claim 1, characterized in that: The lubricating oil circuit further includes: a second temperature sensor, a first pressure sensor, a second pressure sensor, a first filter and a second filter; The first pressure sensor and the first filter are arranged on the pipeline between the first flow channel and the oil inlet; the second temperature sensor, the second pressure sensor and the second filter are arranged on the pipeline between the oil outlet and the second oil pump.

9. A method for controlling a cooling system, characterized in that: Applicable to the cooling system according to any one of claims 1 to 8 above, the control method of the cooling system comprises: If the first temperature is greater than the set temperature range, the controller controls the opening of the electric regulating two-way valve to increase so as to increase the amount of heat absorbed by the cooling water from the secondary coolant; the amount of heat absorbed by the secondary coolant from the lubricating oil increases until the first temperature transmitted to the controller by the first temperature sensor drops to the set temperature range; If the first temperature is lower than the set temperature range, the controller controls the opening of the electric regulating two-way valve to decrease so as to reduce the heat absorbed by the cooling water from the coolant; the heat absorbed by the coolant from the lubricating oil decreases until the first temperature transmitted by the first temperature sensor to the controller rises to the set temperature range.

10. The control method of the cooling system according to claim 9, characterized in that: The lubricating oil circuit further includes: a first solenoid valve and a second solenoid valve; the controller is electrically connected to the first solenoid valve and the second solenoid valve respectively; a first end of the first solenoid valve is communicated with an end of the second oil pump close to the oil outlet; a second end of the first solenoid valve is communicated with an end of the first flow channel close to the first oil pump; the second solenoid valve is arranged between the first oil tank and the second oil pump; The control method of the cooling system further includes: In the first working mode, the controller controls the first solenoid valve and the second solenoid valve to be turned off, and controls the first oil pump to start, so as to inject a set flow of lubricating oil into the test product; In the second working mode, the controller controls the first solenoid valve to be turned off, the second solenoid valve and the electric regulating two-way valve to be turned on, and controls the first oil pump, the second oil pump and the circulating pump to start, so as to adjust the first temperature of the first test product; the first test product is a test product that does not have its own oil pump; In the third working mode, the controller controls the first solenoid valve and the electric regulating two-way valve to be turned on, the second solenoid valve to be turned off, and controls the circulation pump to start to adjust the first temperature of the second test product; the second test product is a test product with its own oil pump.

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